When wishing to print some text on a photograph and make that text sufficiently contrasting to the background image, use a 4 byte code for colour and transparency.
It is the same 4 byte code using by the parameter '-undercolor' in ImageMagick's command lime instruction 'convert'.
The first 3 bytes are the RGB colour code and the fourth byte is the transparency byte.
<?php
$draw = new ImagickDraw();
$draw->setFillColor('#ffff00');
$draw->setFont('Eurostile');
$draw->setFontSize(21);
$draw->setTextUnderColor('#ff000088');
$picin->annotateImage($draw,40,$height-10,0,"Hallo");
?>
The example code produces yellow text on a semi-transparent red background.
ImagickDraw::setTextUnderColor
(PECL imagick 2, PECL imagick 3)
ImagickDraw::setTextUnderColor — Specifies the color of a background rectangle
Descrierea
Avertizare
Această funcție nu este documentată în prezent; este disponibilă numai lista sa de argumente.
Specifies the color of a background rectangle to place under text annotations.
Parametri
-
under_color -
the under color
Valorile întoarse
Nu este întoarsă nici o valoare.
Exemple
Example #1 ImagickDraw::setTextUnderColor()
<?php
function setTextUnderColor($strokeColor, $fillColor, $backgroundColor, $textUnderColor) {
$draw = new \ImagickDraw();
$draw->setStrokeColor($strokeColor);
$draw->setFillColor($fillColor);
$draw->setStrokeWidth(2);
$draw->setFontSize(72);
$draw->annotation(50, 75, "Lorem Ipsum!");
$draw->setTextUnderColor($textUnderColor);
$draw->annotation(50, 175, "Lorem Ipsum!");
$imagick = new \Imagick();
$imagick->newImage(500, 500, $backgroundColor);
$imagick->setImageFormat("png");
$imagick->drawImage($draw);
header("Content-Type: image/png");
echo $imagick->getImageBlob();
}
?>
add a note
User Contributed Notes 1 note
www dot query at gmail dot com ¶
13 years ago
